"BMD have just announced their 4K camera is now shipping and they've dropped the price to $2,995!"

now I'm very curious to see the price of the GH4 and that brick combined!
Also: The BMD4K can do recording on SSD's and has great dynamic range and has a bigger sensor so I'd love to see a comparison of the image quality.

All in all in the end Black Magic might still have an edge over the GH4 unless the GH has a really competitive price tag.